Pasteurizing apparatus



Dec. 30, 1930. A. H. BOILEAU PASTEURIZING APPARATUS Filed June 4. 1928 Patented Dec. 30, 1930 UNITED STATES PATENT OFFICE ARTHUR H. BOILEAU, OF CEDAR RAPIDS, IOWA, ASSIGNOB, BY'MESNE ASSIGNMENTS,

TO CHERRY-BURBELL CORPORATION, 01 WILMINGTON, DELAWARE, A CORIPOBA- 'rron or DELAWARE PABTEUBIZIN G .A.II?IPARA'1US Application filed June 4, 1928. Serial No. 282,751.

The invention relates to apparatus for pasteurizing, cooling and ripening liquids, and its object is to provide means of novel and simple construction for rendering the apparatus adaptable for both heating and cooling purposes.

Another object of the invention is to provide a novel ejector having adjusting means for regulatin the amountof steam which is used for heating the water and for causing a proper circulation of the water in the system.

In the accompanying drawing illustrating a selected embodiment of the invention, the views are as follows:

Fig. 1 is a detail side elevation partly in section showing my improved pasteurizing machine.

Fig. 2 is an end view thereof.

Fig. 3 is a detail sectional view of the improved ejector.

Referring to the drawings, 5 designates generally a asteurizing tank to receive milk or cream an it is supported in suitable stands or saddles 6. A coil 7 is arranged in the tank and has its ends 8 and 9 extending through the ends 10 and 11 of the tank. A cross- 12 is connected to the end 8 of'the coil and an overflow pipe 13 is connected to the upper end of the cross. A pipe 14, provided with a drip cock 15, connects the lower end of the cross-l2 with the pipe 16 which is supported in the saddles 6.

An ejector 17, having a steam inlet 18, is arranged at the end of the pipe 16 for heating the water and circulating it through the pipe 16. Another pipe 19 connects the pipe 16 with the end 9 of the coil. The ejector 17 comprises a casing 20 and is provided with the water inlet 21 to which the pipe 14 is connected, with the steam inlet 18, and with the water outlet 22 to which the pipe 16 is connected. Steam entering the inlet 18 passes through the nozzle 23within the ejector casing 20 and forces waterthrough a tubular body, or water nozzle 24, having bell-shaped ends 25, '25, and gives velocity to the water in the ipe lines and coil, to heat and circulate the water through the piping. A rod 26 is threadedly mounted in the end of the eiector and is provided with a tapered end he used so that the waterv will not be to the boiling point by a large amount of '27 which fits into the steam nozzle 23, and is adjustable therein, to-reduce or enlarge the size of the opening in the nozzle through which the steam passes. A hand wheel 28 is arranged on the outer end of the rod 26 for operating the same. This ejector controls the volume of steam for use with a wide range of pressures and it is adaptable to the demands of 'a'variety of sizes of pasteurizers.

The coil and pipe lines are filled with water and steam passing through the inlet .18 and regulated by the rod 26 heats the water in the pipe line 16 and forces it through the nozzle 24, the coil 7, and then back through the pipe 14 to be circulated again. When the steam pressure is comparatively low, a

large opening is required to permit enou h steam to pass through the nozzle so that t e time required for heating the contents of the pasteurizer will not be too long. When the steam pressure is high, a small openin mus;

eate

steam which would pass through under this high pressure, as heating the water to a boiling point causes improper circulation of the water and may cause damage to the contents 1 of the tank. Since the condensed steam is continually adding to the volume of water in the system, the surplus water will flow out through the overflow pipe line 13. A small hole 29 is provided in the elbow 13, in the overflow line so that there is no possibility of the overflow line having a siphoning effect and draining the water from the entire system;

When the pasteurizer is to be used for cooling purposes, a brine pipe line 30 is connected to the T 31 which is also connected to the pipe 19, and the end 9 of the coil, and a valve 32 arrangedin the line 19 is closed to prevent the brine from entering the pipe line 16. A valve 33 is arranged in the pipe 14 and below the cross 12 to prevent the brine from entering the pipe lines 14 and 16, and a valve 30' arranged in the line 30 is used to shut off the brine supply. A brine return line 84 is con nected to the cross 12 at 35 and leads to the brine tank. (not shown) where it is again pumped through the brine line 30.

A valve 36 is arranged in the overflow pipe 13 to prevent the brine from passing out through this line. If, however, cold water is to be used for cooling purposes, the brine return line 34 is omitted and the openin 35 is provided with a suitable closure cap. lhe water will then pass through the overflow line 13 and not be used again.

The invention provides means of simple construction which can be easily and guickly operated for heating or cooling the uid in the pasteurizer by the mere operation of a few valves; and the ejector can be adjusted for use with a large range of steam pressures 15 and is adaptable to the demands of a variety of sizes of pasteurizers.

Changes may be made in the form, construction and arrangement of the parts without departing from the spirit of the invention or sacrificing any of the advantages thereof and the right is hereby reserved to make all such changes as fairly fall within the scope of the following claims.

I claim:

1.. A pasteurizer comprising a tank, a coil in said tank, a brine line connected to one end of said coil, an outlet at the other end of said coil, and a water line connected to said brine line and said outlet around said coil,

means for selectively puttingeither of said lines into operation, a steam injector connected to said water line for heating the water and causing circulation thereof, means for closing said brine line connection to the coil,

36 and means for regulating the amount of steam passing through said injector.

2. A pasteurizer comprising a tank, a coil in said tank and having its ends projecting through the ends of said tank, a cross con- 40 nected to one end of said coil, an overflow pipe connected to said cross, a valve in said overflow pipe, a pipe line connecting said cross and the other end of said coil, brine inlet and outlet pipe lines operatively connected to said coil, a plurality of valves for selectively shutting off any of said lines, asteam injector connected to one of said lines, and means for regulating the flow of steam through said injector.

ARTHUR H. BOILEAU. 

